The opening sequence in live action shows Gulliver announcing his intention to go to sea as a ship's surgeon, followed by scenes of a shipwreck. The remainder of the film has Harris on Lilliput and Blefuscu, with the tiny inhabitants created by animation.
The film ends with a cliffhanger: Having escaped by boat from Lilliput, Gulliver encounters one of the giant inhabitants of Brobdingnag, but there is nothing more about his adventures there or in the other lands mentioned in the novel.
Richard Harris as Gulliver
Catherine Schell as Mary
Norman Shelley as Father
Meredith Edwards as Uncle
Michael Bates
Denise Bryer
Julian Glover
Stephen Jack
Bessie Love
Murray Melvin
Nancy Nevinson
David Prowse (uncredited)
Robert Rietti
Norman Shelley
Vladek Sheybal
Roger Snowden
Bernard Spear
Graham Stark
based on the 1726 novel of the same name by Jonathan Swift.